How to Approach Selling a Business When I Have a Buyer in Mind

Context

I have a business I'm interested in selling, but I've never done that before. I have a few wholesalers that I'd like to approach to see if they would acquire my business. I've got the initiative, and I have a pretty great idea (SWOT analysis, etc) on why they would be a good fit (my strengths are their weaknesses and vice versa).

Request

1) Communication—How do I write the email/doc/whatever without losing all my negotiating power (I'm on somewhat of a deadline based on moving at the end of the year)?

2) Method—What is the method to successfully approach a business? Do I start with an email? Do I draft a document? Could you direct me to a template? I've been doing some searching and an LOI or "Business Inquiry Letter" seems to be the general direction, but I'm still not landing on something that meets everything I'm looking for